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Derivative Instruments - Additional Information (Detail) (USD $) |  |  |  | 3 Months Ended
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Mar. 31, 2014 Foreign Exchange Forward | Dec. 31, 2013 Foreign Exchange Forward | Mar. 31, 2013 Foreign Exchange Forward | Mar. 31, 2014 Foreign Exchange Forward Designated As Hedging Instrument | Mar. 31, 2013 Foreign Exchange Forward Designated As Hedging Instrument | Mar. 31, 2014 Foreign Exchange Forward Not Designated As Hedging Instrument | Mar. 31, 2013 Foreign Exchange Forward Not Designated As Hedging Instrument | Mar. 31, 2014 Maximum
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |  |  |  |  |
Maximum term for foreign currency forward exchange contracts |  |  |  |  |  |  |  | 18 months
Notional amount of foreign currency forward exchange contracts | $ 1,860,000,000 | $ 1,550,000,000 | $ 1,550,000,000 |  |  |  |  |
Net (loss) gain reclassified from accumulated other comprehensive loss to the consolidated statements of operations for derivatives designated as hedging instruments |  |  |  | (2,767,000) | 1,129,000 |  |  |
Net gain (loss) recognized in the consolidated statements of operations for derivatives not designated as hedging instruments |  |  |  |  |  | $ 9,324,000 | $ (13,372,000) |

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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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- Definition The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624171-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4D -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624177-113959 + Details
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- Definition Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624171-113959 + Details
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- Definition Period the derivative contract is outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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